Ehlers-Danlos syndrome is a genetic condition that impacts how the body processes collagen. Collagen makes up about 30 percent of the human body, which means symptoms of the syndrome may be felt in multiple places. However, it is often difficult for patients in New York and elsewhere to be diagnosed with the condition because its symptoms may be seen as localized issues. For example, knee pain may be diagnosed as tendinitis while a shoulder issue may be seen as bursitis.